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PYSEC-2018-79
Vulnerability from pysec - Published: 2018-06-26 16:29 - Updated: 2021-08-25 04:30
VLAI
Details
aaugustin websockets version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appear to be exploitable via Sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in 5.
Impacted products
| Name | purl | websockets | pkg:pypi/websockets |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "websockets",
"purl": "pkg:pypi/websockets"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1",
"1.0",
"2.0",
"2.1",
"2.2",
"2.3",
"2.4",
"2.5",
"2.6",
"2.7",
"3.0",
"3.1",
"3.2",
"3.3",
"3.4",
"4.0",
"4.0.1"
]
}
],
"aliases": [
"CVE-2018-1000518",
"GHSA-6g87-ff9q-v847"
],
"details": "aaugustin websockets version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appear to be exploitable via Sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in 5.",
"id": "PYSEC-2018-79",
"modified": "2021-08-25T04:30:36.925398Z",
"published": "2018-06-26T16:29:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-6g87-ff9q-v847"
}
]
}
BREW-HERMES-AGENT-CVE-20… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:56 – Updated: 2026-09-10 19:27 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@15.0.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "hermes-agent",
"purl": "pkg:brew/hermes-agent"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.8.3_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@15.0.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "15.0.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-hermes-agent-CVE-2018-1000518",
"modified": "2026-09-10T19:27:17Z",
"published": "2026-08-13T16:56:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-KEEPER-COMMANDER-CV… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:01 – Updated: 2026-09-10 00:15 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@17.0.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "keeper-commander",
"purl": "pkg:brew/keeper-commander"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "18.1.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@17.0.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "17.0.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-keeper-commander-CVE-2018-1000518",
"modified": "2026-09-10T00:15:38Z",
"published": "2026-08-13T17:01:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-KIMI-CLI-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:01 – Updated: 2026-09-10 00:17 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@16.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "kimi-cli",
"purl": "pkg:brew/kimi-cli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.48.0_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-kimi-cli-CVE-2018-1000518",
"modified": "2026-09-10T00:17:52Z",
"published": "2026-08-13T17:01:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-LANGGRAPH-CLI-CVE-2… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:02 – Updated: 2026-09-10 00:18 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@15.0.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "langgraph-cli",
"purl": "pkg:brew/langgraph-cli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.4.31"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@15.0.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "15.0.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-langgraph-cli-CVE-2018-1000518",
"modified": "2026-09-10T00:18:25Z",
"published": "2026-08-13T17:02:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-MCP-ATLASSIAN-CVE-2… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:13 – Updated: 2026-09-10 00:30 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@17.0.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "mcp-atlassian",
"purl": "pkg:brew/mcp-atlassian"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.23.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@17.0.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "17.0.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-mcp-atlassian-CVE-2018-1000518",
"modified": "2026-09-10T00:30:25Z",
"published": "2026-08-13T17:13:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-MCPM-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:13 – Updated: 2026-09-10 19:56 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@16.0",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "mcpm",
"purl": "pkg:brew/mcpm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.15.0_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.0",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.0"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-mcpm-CVE-2018-1000518",
"modified": "2026-09-10T19:56:14Z",
"published": "2026-08-13T17:13:14Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-MISTRAL-VIBE-CVE-20… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:14 – Updated: 2026-09-10 00:31 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@16.0",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "mistral-vibe",
"purl": "pkg:brew/mistral-vibe"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.24.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.0",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.0"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-mistral-vibe-CVE-2018-1000518",
"modified": "2026-09-10T00:31:16Z",
"published": "2026-08-13T17:14:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-OMNARA-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:19 – Updated: 2026-09-10 00:41 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@15.0.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "omnara",
"purl": "pkg:brew/omnara"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@15.0.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "15.0.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-omnara-CVE-2018-1000518",
"modified": "2026-09-10T00:41:55Z",
"published": "2026-08-13T17:19:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-OTERM-CVE-2018-1000518 (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:24 – Updated: 2026-09-10 20:19 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@16.1.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "oterm",
"purl": "pkg:brew/oterm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.23.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.1.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.1.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-oterm-CVE-2018-1000518",
"modified": "2026-09-10T20:19:31Z",
"published": "2026-08-13T17:24:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
BREW-PYTHON-LSP-SERVER-C… (GHSA-6G87-FF9Q-V847)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:29 – Updated: 2026-09-10 01:01 – Source website
VLAI
Summary
websockets is vulnerable to denial of service by memory exhaustion
Details
The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "websockets",
"resource_purl": "pkg:pypi/websockets@16.1.1",
"upstream_fixed_in": "5.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "python-lsp-server",
"purl": "pkg:brew/python-lsp-server"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.15.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/websockets@16.1.1",
"name": "websockets",
"resource": "websockets",
"strategy": "registry",
"subject_version": "16.1.1"
}
]
},
"details": "The Python websockets library version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appears to be exploitable via sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in version 5.0",
"id": "BREW-python-lsp-server-CVE-2018-1000518",
"modified": "2026-09-10T01:01:31Z",
"published": "2026-08-13T17:29:47Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000518"
},
{
"type": "WEB",
"url": "https://github.com/aaugustin/websockets/pull/407"
},
{
"type": "PACKAGE",
"url": "https://github.com/aaugustin/websockets"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/websockets/PYSEC-2018-79.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "websockets is vulnerable to denial of service by memory exhaustion",
"upstream": [
"GHSA-6g87-ff9q-v847",
"CVE-2018-1000518",
"PYSEC-2018-79"
]
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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